Masama ba ang Kremil-s sa buntis?

Depends on your health history and how far you are in your pregnancy. Kremil-S and Simeco contain either aluminum hydroxide, which can cause aluminum deposition if the mom has kidney failure, and/or magnesium hydroxide, which may theoretically slow down labor if you're on your 3rd trimester. Imodium is a no-no.

There are a lot of very safe antacids for pregnancy, but you'll have to ask your ob-gyne what she thinks will be fine in your case. She knows your whole history and will be able to prescribe you something for your heartburn.